Connector for shielded cables

Abstract: A connector for shielded cables comprises a housing of insulating material and signal and ground contacts accommodated in said housing and to which corresponding conductors of the cables are connectable, said contacts being arranged in rows and columns. The housing is assembled of one or more modules and at least one module cap, wherein each module can be detachably mounted in the module cap in a predetermined position with respect to the module cap, and wherein each module is provided with at least one column of contacts.

Description: The invention relates to a connector for shielded cables according to the preamble of claim 1. Such connectors are known in several embodiments. Generally, the number of signal and ground contacts of the connector and thereby the dimensions of the housing of the connector is adapted to the number of shielded cables to be connected by one connector to a coupling socket as required by the user. This means that a large number of different connectors has to be manufactured. Moreover, the housing of the usual connector consists of one part or a plurality of permanently assembled parts, whereby a repair of the connector for a fault in one cable is difficult. WO 92/22943 and US-A-5 114 364 disclose a connector for shielded cables according to the preamble of claim 1. The housing of this known connector comprises one module cap only and it is not possible to combine two or more module caps in such a manner that a fixed spacing between successive contacts in row direction throughout the complete connector will be maintained. The invention aims to provide a connector of the above-mentioned type which is made in such a manner that the dimensions of the connector can be adapted to the required number and type of cables to be connected in a very simple manner. To this end the connector of the invention is characterized by the characterizing features of claim 1. Thereby, a connector is obtained which by combining module caps with one or more modules can be adapted to the number of cables to be connected to the connector. As each module can only be mounted in one predetermined position in the module cap, connection errors are excluded. Different modules can be provided for different types of cables. Thereby, the connector of the invention can be easily adapted to the requirements of the user. Moreover, repair of the connector is possible in a simple manner. The invention will be further explained hereinafter by reference to the drawings in which several embodiments of the connector according to the invention are shown. Fig. 1 shows a perspective view of a module cap of a first embodiment of the connector according to the invention, wherein two shielded cables with a differential pair of signal conductors to be connected are shown. Fig. 2 shows a perspective view of the module cap of Fig. 1, wherein the signal and ground conductors of the cables are connected to the corresponding contacts of a module. Fig. 3 shows a perspective view of the module cap of Fig. 1, wherein three modules are shifted into the module cap in different positions. Fig. 4 shows the module cap with modules of Fig. 3, wherein all modules are in the assembled position. Fig. 5 shows a perspective view of a coupling socket with signal and ground contact pins, wherein three connectors according to Fig. 1-4 are plugged into the coupling sockets. Fig. 6 shows a perspective view of a second embodiment of the connector of the invention, wherein four modules are shown in different positions with respect to the module cap. Fig. 7 shows a perspective view of one module of the connector of Fig. 6. Fig. 8 shows the connector of Fig. 6, wherein all modules are in the assembled position. Fig. 9 shows a perspective view of a third embodiment of the connector according to the invention. Fig. 10 shows a perspective view of a module of the connector of Fig. 9. Fig. 11 shows a fourth embodiment of the connector according to the invention made with the module of Fig. 10. Referring to Fig. 1-5 there is shown a first embodiment of the connector according to the invention, which connector in this case is intended for connecting shielded cables 1 with a differential pair of signal conductors 2 and a ground or drain wire 3 which are together enclosed by a metallized foil 4 working as a shielding. Fig. 1 shows a module cap 5 suitable for receiving three modules 6 which are further shown in Fig. 2-4. An upper wall of the module cap 5 which cannot be seen in Fig. 1, is provided with inlet openings for the cables 1. The module cap 5 comprises strain relief means for the cables 1 which in this case are made as supports 7, the opposite main faces of which are adapted to the shape of the cables 1. The cables 1 are clamped on a support 7 by a shrink sleeve 8 (see Fig. 4 and 5) two by two, whereby the desired strain relief is obtained. The module cap 5 is provided with two opposite side walls 9, 10 which at the outer side each are provided with a step-like guiding profile or shape 11 adapted to cooperate with a complementary step-like guiding profile 12 of a coupling socket 13 shown in Fig. 5 and in which signal contact pins 14 and ground contact pins 15 are arranged in rows and columns. The row direction is indicated by r and the column direction by c. As the step shapes are mirror symmetrical with respect to the row direction, the module cap can be plugged into the coupling socket 13 in one position only. Of course, other profile shapes are also possible and the side walls 9, 10 can be provided with different profile shapes or one side wall 9, 10 can be flat. Both side walls 9, 10 of the module cap 5 are provided at their inner side with first guiding slots 16 and second guiding slots 17 lying at a fixed intermediate spacing. In the embodiment shown the guiding slots 16 are straight whereas the guiding slots 17 are dovetail-shaped. Of course, the guiding slots 16, 17 can be shaped in a different manner. Each module 6 comprises a housing made of insulating material and in which in this embodiment a central ground contact 18 and at both sides of the ground contact 18 two signal contacts 19 are provided. The contacts 18, 19 are aligned in column direction. The outer walls 20, 21 extending in row direction are provided with guiding ribs 22, 23 which can be fittingly received in the guiding slots 16, 17. Thereby, the modules 6 can be mounted in the module cap in one position only with respect to the module cap 5. The attachment of a module 6 in the module cap 5 can be provided by a snap connection for example. To this end it is for example possible to provide a small nose in one or both guiding slots near the upper wall of the module cap 5 cooperating with a recess in the guiding ribs 22, 23. In this manner a simple detachable mounting is possible. As shown in Fig. 2, each module 6 comprises two outer walls 24, 25 extending in column direction, between which the contacts 18, 19 are received, wherein one outer wall 24 is shorter, so that a connection part 26 of the contacts 18, 19 is well accessible. For assembly of the described connector the signal conductors 2 and the ground conductors 3 can thereby easily be connected with the connecting parts 26 of the corresponding signal contacts 19 and ground contact 18, respectively, whereafter the connection with the connecting parts 26 can be established by soldering or the like. Thereafter, the module 6 is shifted into its position in the module cap 5. The connecting parts 26 of one module 6 are covered in the mounted position of Fig. 4 by the long outer wall 25 of the next module 6, wherein the connecting parts 26 of the module at an end of the module cap 5 are covered by a cover wall 27 of the module cap 5. From the foregoing it will be clear that the connector described comprises a housing assembled of a module cap 5 and modules 6 detachably mounted in the module cap 5. In this manner connecting signal conductors 2 and ground conductors 3 to the connecting parts 26 of the contacts 18, 19 is very simple. Moreover, in case of a fault in the connection of one of the cables, maintenance of the connector can easily take place. Replacement of one of the modules 6 is also possible in an easy manner. Of course, it is possible to make the module cap 5 with different dimensions, so that for example eight modules 6 can be mounted in the same. By providing some module caps 5 which are suitable for receiving different numbers of modules 6, it is possible to adapt the connector of the invention in accordance with the requirements of the user by combining different module caps 5. The adjacent module caps 5 can be attached to one another for example by a dovetail connection. The dimensions of the module caps 5 and the modules 6 are such that the spacing between the contacts 18, 19 in row direction within one module cap 5 is equal to the spacing between adjacent contacts 18, 19 of interconnected module caps 5. In the embodiment described this spacing in row direction is 2 mm, so that two differential pairs of signal conductors can be connected per mm spacing. The assembly of the housing of the connector of one or more module caps 5 and modules 6 also provides the possibility to make the connector suitable for different types of cables in a simple manner by providing modules 6 made in a different manner. Referring to Fig. 6-8 there is shown an embodiment of the connector according to the invention, the housing of which is assembled of a module cap 28 in which four modules 29 are mounted. These modules 29 each are suitable for connecting two twinaxial cables 30. In this embodiment the modules 29 each comprise two columns of locations for ground contacts 18 and signal contacts 19. Fig. 7 shows a perspective view of one module 29 wherein the connecting parts 26 of four signal contacts 19 can just be seen. Two signal contacts 19 adjacent in row direction are enclosed by an outer conductor 31, wherein a dielectrical intermediate piece 32 of insulating material lies between the signal contacts 19 and the outer conductor 31. Each outer conductor 31 includes a connecting part 26 for the ground conductor of the twinaxial cables 30. When the signal conductors of the twinaxial cable 30 are connected to the connecting parts 26 of the signal contacts 19, a closing lip 33 of the outer conductor 31 is bent into the position also shown in Fig. 7, so that a substantially uninterrupted shielding is maintained. Each of the outer conductors 31 can be connected with one or more ground contacts 18 not shown in Fig. 6-8, whereby a desired configuration of signal and ground contacts can be obtained. In this case the modules 29 are provided with three guiding ribs 22, 23 at their outer walls 20, 21, so that a module 29 occupies just the same space as three modules 6. For the remaining part the construction of the module cap 28 and the modules 29 fully corresponds with the construction described of the module cap 5 and the modules 6. It can be seen in Fig. 6 and 8 that the module cap 28 at one end has a dovetail-shaped rib 34 and at the other end a complementary slot 35 for interconnecting successive module caps 28. Fig. 9 and 10 show a third embodiment of the connector according to the invention, wherein the housing is assembled of a module cap 36 in which only one module 37 is mounted. The construction of the module cap 36 and the module 37 again corresponds with the construction already described of the module cap 5 and the modules 6. In this case the module 37 is provided with two guiding ribs 22, 23, so that the module 37 occupies just the same space as two modules 6. The module 37 shown in a perspective view in Fig. 10, is intended for connecting two coaxial cables 38 and comprises a column of locations for ground contacts 18 and signal contacts 19 not further shown in the drawings. In the embodiment shown a signal contact 19 is located at both sides of a central ground contact 18, wherein the connecting parts 26 of the signal contacts 19 are shown in Fig. 10. In the same manner as in the above-described module 29, each signal contact 19 is enclosed by an outer conductor 31 with connecting part 26 for connecting the shielding of the coaxial cable 38. Each outer conductor 31 is connected to the central ground contact 18 on the one hand and on the other hand with a ground contact lying at the other side of the signal contact 19. Of course, other configurations of signal and ground contacts are possible. Finally, Fig. 11 shows an embodiment of the connector according to the invention, the housing of which is assembled of a module cap 39 and six modules 37 mounted in the module cap. From the foregoing it will be clear that the invention provides a connector which, by assembling one or some module caps 5, 28, 36 and/or 39 and modules 6, 29 and/or 37, is suitable for various applications for various numbers of different types of shielded cables. The assembly of the connector and connecting the conductors of the cables is very simple due to the modular construction. Moreover, replacement of parts which possibly show a fault, is possible. It is noted that while maintaining the favourable modular construction different numbers of signal and ground contacts can be accommodated in one module depending on the desired configuration of signal and ground contacts in the connector. The invention is not restricted to the above-described embodiments which can be varied in a number of ways within the scope of the invention.

Claims: Connector for shielded cables (1, 30, 38), comprising a housing of insulating material and signal and ground contacts (18, 19) accommodated in said housing and to which corresponding conductors (2, 3) of the cables are connectable, said contacts being arranged in rows and columns, said housing including a module cap (5, 28, 36, 39) and a plurality of modules (6, 29, 37) detachably mounted in said module cap, wherein each module is provided with at least one column of contacts, characterized in that the housing is assembled of at least two module caps (5, 28, 36, 39), each having one or more modules (6, 29, 37), wherein each module can be detachably mounted in the corresponding module cap in one predetermined position with respect to the module cap and wherein said module caps can be attached one to another in row direction, wherein the spacing between successive contacts (18, 19) in row direction in a module cap is equal to the spacing between successive contacts in module caps attached to one another. Connector according to claim 1, characterized by different modules (6, 29, 37) for different types of shielded cables (1, 30, 38), said different modules being adapted to be mounted in the same module cap (5, 28, 36, 39). Connector according to claim 1 or 2, characterized by module caps (5, 28, 36, 39) for receiving different numbers of modules (6, 29, 37). Connector according to anyone of the preceding claims, characterized in that each module cap (5, 28, 36, 39) comprises strain relief means (7, 8) for the cable(s) (1, 30, 38). Connector according to anyone of the preceding claims, characterized in that each module cap (5, 28, 36, 39) comprises two opposite side walls (9, 10) extending in row direction, wherein the outer side of at least one side wall has a guiding profile (11) adapted to cooperate with a complementary guiding profile (12) of a coupling socket (13). Connector according to anyone of the preceding claims, characterized in that at least one of the side walls (9, 10) of the module cap (5, 28, 36, 39) extending in row direction is provided at its inner side with first guiding slots (16) at a fixed intermediate spacing, wherein each module (6, 29, 37) at at least one outer wall (20, 21) extending in row direction comprises at least one guiding rib (22) fitting into a first guiding slot. Connector according to claim 6, characterized in that the outer side wall (10) of the module cap (5, 28, 36, 39) extending in row direction is provided at its inner side with second guiding slots (17) at a fixed intermediate spacing, said second guiding slots having a different shape than the shape of the first guiding slots (16), wherein each module (6, 29, 37) at its other outer wall (21) extending in row direction has at least one guiding rib (23) fitting into a second guiding slot. Connector according to anyone of the preceding claims, characterized in that each module (6, 29, 37) comprises two outer walls (24, 25) extending in column direction, between which outer walls the signal and ground contacts (18, 19) are located, wherein one outer wall (24) is shorter than the other outer wall (25) to expose connection parts (26) of the signal and ground contacts, wherein a cover wall (27) is provided at one end of the module cap (5, 28, 36, 39) for covering the connection parts of the adjacent module. Connector according to anyone of the preceding claims, characterized by a module (6) having at least one column of contacts (18, 19) with a central ground contact (18) and two signal contacts (19) at both sides thereof. Connector according to anyone of the preceding claims, characterized by a module (37) having at least one signal contact (19) enclosed by an outer conductor (31) connected with at least one ground contact (18). Connector according to anyone of the preceding claims, characterized by a module (29) having at least one pair of signal contact (19) enclosed together by an outer conductor (31) connected with at least one ground contact (18).

Inventors: CREELLE EDDY KAMIEL, JONCKHEERE LUC, MORLION DANNY, VAN KOETSEM JAN PETER KAREL, CREELLE, EDDY KAMIEL, JONCKHEERE, LUC, MORLION, DANNY, VAN KOETSEM, JAN PETER KAREL
Applicants: FRAMATOME CONNECTORS INT, FRAMATOME CONNECTORS INTERNATIONAL
Application year: 1994
Main classification: H01R13
IPC codes: H01R13